Sorry... This site requires a JavaScript enabled browser.

Minimising the impacts of heat stress should be at the front of dairy farmers’ minds as highs above 30C and in-shed night-time temperatures of above 20C become commonplace.

This is according to Wynnstay dairy specialist Beth Parry, who says extreme heatwaves have been common this year, and should prompt action.

Mrs Parry’s advice comes during an amber warning of extreme heat issued by the Met Office for most of the southern half of the UK, which lasts until the end of Sunday.

See also: Water abstraction ban a ‘devastating blow’ for Fife veg growers

“As a result of the high temperatures in the day and staying overnight, cows will struggle and performance and fertility may be affected,” she says.

“When the 24-hour daily average temperature humidity index is 65 or more (achieved when hitting only 21C and 60% humidity), then conception rates, days open and anestrus will be impacted.

“This can affect not only cows being served on the day, but also those served up to three weeks ago, and those to be served in the next three weeks.”

Met Office predictions suggest extreme weather events may become the norm, says Mrs Parry. Ventilation and fans are long-term solutions that require investment, but will bring major benefits.

Mrs Parry suggests six management techniques that farms can start doing straight away which will help through warm weather spells.

Visit our Know How centre for practical farming advice